Combined transmission gear and gear box



A 1930. H. P. PRIGG COMBINED TRANSMISSION GEAR AND GEAR BOX 3 Sheets-Sheet 1 Filed July 19, 1929 H PazzZPW' y,

ATTORNEY Aug. 5, 1930. H. P. PRIGG 1,772,158

COMBINED TRANSMISSION GEAR AND GEAR BOX Filed July 19, 1929 3 Sheets-Sheet 2 INVENTOR ATTORNEY 5, 1930. PR|GG 1,772,158

COMBINED TRANSMISSION GEAR AND GEAR BOX Filed July 19, 1929 3 Sheets-Sheet 3 $5 I 7), \A 1 A fif azziPi' y INVENTOR ATTORNEY Patented Aug. 5, 1930 UNITED STATES nnnnnn rtrnnn rnree, OFJMIAMI, FLORIDA oomnrnnnrnmvsivrrssron GEAR AND GEAR ox Application filed July 19; 1929. Serial N0. 379,474.

This invention relates toacombinefd gear box and transmission gear, the 4 general ob.- ject ofthe'invention being to provide means for transmitting-the power from a motor to 5 a propeller shaft which includes reduction gears and reversing meansarranged in a single box, the invention enabling a boat to be driven from an ordinaryt ype ofautomobile engine and the installing of the engine in a level position. I a j This inventionalso consistsin certain other features ofconstruction and .inthe comloina-v tion and arrangement of :thaseveralparts, to be hereinafter .fully described, illustrated in the accompanying. drawings andxspecifically pointed out in the appended vclaims.

- In describing the. invention in detail, reference 'willbe had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views andin whichz v;

Figure 1 is a sectional view showing :one fornrof the-invention.

Figure 2is .a section on line-2+2 of Figure 1. a I e Figure 3risva perspective view of the clutch shifting means. t

Figure: -is a sectional --view showingram other formof the invention.

I Figure 5 isatopplan-view'of Figurel,

' Figure :6 is anend view of the double gear on themotor driven shaft. 1 Figure 7 issa section on line 7r.7 ofFigure 4. g Figures 8,9 and :10 vare diagrammatic'views showing'how the invention can bearranged with respect :to the lengine.

Referring to Figures 1 to3,;the letter A indicates a boxtor casingaand the numeral 1 40 indicates a portion 10f the propeller shaft which extends within the casing and is suitab'l-y"journaled'thereinaas shown at '2. This shaft carries the'gear' 3 and the'friction wheel 4, the :gear and wheel having "beveled peripheriesr Astub shaft 5 :is journaled in the box-or casingand has slidably mountedathere on a double conical friction member :6, with a spring 7 normally holding the one, conical P r of the m 'e u of ngagement with the friction wheel 4. I he shaft 8, whioh is r e r m e ng e, ha e-v helw (PQIfiO n g, t th hex en a; eeet n .8

this shaft extends intothje hollow pprtio' e nin gu l- The hub? ofajbeveled; g r 1 is rot blv arranged in on ide of the x "a d a part of h h ew p rtion of the ha tfi i r t h -y a re ge iht iehub. h geer l e h e wi h e grea fend-has clu h teeth 1 o its -nn rrfe e- W are a apt d; t engeg t e u eh-te th 2 1011 n d wit on face f th f ie ienwl1eelitz3 which isslidably but non-rotatably mop-med theehaft 18. Thi h el 13 ham beveled pe phe y for engag ng-the econd pen 1 .5 he {me i. e 6 'When-th ee h 2areimeved. out

of mesh with therteeth 11, 1

Aepair e 'er s-h acl 4 is f s ened to pa oaf ds 5 lid blysuppo ted n h gear ox :an 'l pa ing through. one wa hereof and a 11in}; '16 is connected ;toi a cross piece w ich eo e te i e voute l nds elf-themes to-; gether, t i ink being su tably eenneetedwto a .-p lalo l v e that he. rods; 15 be m v dlo gitu ina ly- :A ff ial sMerse rods 18 is carried'by the cross heads 14 and 7 these rods 1 8 ;p'ass through at-groovel9 formed in a portion of the ,gear: 13 so thatiwhenkthe cross heads andmods 15 are moved, the gear 13 WiL-Lbe zshitted -;t,rem the. neutra positi n to -a "position where theteeth lQ' WilIfenga-ge the teeth: 11 or: to a position-where the gear willengagegthe member6. Y 4

From the f egoing i wl bea een tha when-the :teeth 12 are in engagement with the teeth 11, =:motion of: the shaft {8 .avill be transmitted to the propeller-shaft 1' through the; gears: 10 end- :3: and that when the gear; is} movedtineengagement with the member -6 andksufficient pressure applied to the clutch shiftingmeans to cause. the member 6 ;to engage the friction Wheel 4, then motion of, the shaft 8 will be transmitted to the propeller shaft through the parts 13, 6 and 4 to rotate the shaft 1 in a reverse direction.

In the modification, the reverse motion is imparted to the propeller shaft from the drive shaft through means of gears instead of the friction members and in said modification, the gear 10 is formed with an extension having internal teeth 20 thereon which are engaged by the teeth of the sliding gear 13 carried by the shaft 8 and said gear 13, when moved to a certain position, will also mesh with the teeth of a gear 21 carried by a stub shaft and said gear 21 has attached thereto a beveled gear 22 which meshes with a beveled gear 23 on thepropeller shaft 1.

Thus when the gear 13 is in mesh with the teeth 20, the propeller shaft will be driven in one direction through the gears 10 and 3 and when the gear 13 has been moved out of mesh with the teeth and into'mesh with the gear21,"the propeller shaft will be rotated in a reverse direction through means of said gears 13' and 21 and the gears 22 and 23.

The means for shifting the gear 18 comprises a tubular member 24 fastenedto a shaft 25 journaled in a part a of the box or casing A, with its ends projecting from said part a so that a shifting member 26 may be attached to one or bothof said ends. The tubularmember 24 is provided with the depending arms 27 which carry rollers 28 which are arranged in an annular groove 19 in the hub of the gear 13. A detent 29 holds the tubular member, with its associated parts, in adjusted position. The shaft 8" may be connected to the shaft of a motor or a shaft .driven'from the motor through the coupling 30 and the oppositeend of the shaft 8 may be provided with the clutch 81 for receiving a crank, such as shown at 32 in Figures 8 and 9,.so thatthe engine can'be started by hand. Of course, this hand cranking means can be used with the first form of theinvention, or the motor in both forms of the invention may be provided withpower starters. Suitable anti-friction bearings are provided for the various parts, as shown at From the foregoing it will be seen'that I have provided a combined gear box with reduction gears and forward and reversing means arranged in a single unit'for enabling a propeller shaft of a boat to be driven from an automobile. motor and the invention permits the motor to be placed in a horizontal position with the propeller shaft arranged in a diagonal position. The invention also permits the engine to be placed in front of the gear box, as shown in Figure 8, where the letter M indicates the motor and the letter A the gear arrangement, or the motor can be placed in the stern of the boat in rear of the gear arrangement, as shown in Figure 9, or

two motors can be used, one in front of the gear box and the other in rear thereof, as shown in Figure 10.

While the driven shaft is referred to as a propeller shaft, it will be understood that this shaft is really attached to the propeller shaft by a suitablecoupling. The reduction gears may be of any desired ratio and the ratio may be changed by simply substituting other gears for those in use. 7

While Figure 9 shows the motor arranged close to the gear -box,it will be understood that the motor canbe placed any desired distance from the box, as any length of shaft canbe used for connecting the motor shaft to the'drive shaft;

1 It is thought from the foregoing descrip- "tion that the advantages and novel features of the inventionwillbe readily apparent.

It is to be understood that changesmay be made in the construction and in the combination and arrangement of the several parts,

provided that I'such changesfallwithin the.

scope of the appended claims.

What I claim is 1- 1 '1. A device of the classdescribed comprising a drive shaft, a driven shaft, reducing gears connecting the shafts together, the gear on the drive shaft being loosely arranged thereon and having exterior and interior teeth thereon, a sliding gear on the drive shaft adapted to mesh with the interior teeth of the reducing gear, a reversing gear onthe driven shaft, a stub shaft, a double gear thereon having a part meshing with the re, versing gear and another part adaptedto mesh with the sliding gear and manully operated means for moving the sliding gear from aneutral position into engagement with either the interior teeth of the reducing gear or into engagement Witha part of the double gear. I. Y I

2. A device of the class described comprise ing a drive shaft, a driven shaft, reducing gears connecting the shafts together, the gear on the drive shaft beingloosely arranged thereon and having exterior and interior teeth thereon, a sliding gear on the vdrive shaft adapted to mesh with the interior teeth of the reducing gear, a reversing gear on the driven shaft, a stub shaft, a double gear thereon having a part meshing'with theres versing gear and another part adaptedto mesh with the sliding gear, manually op:- eratedmeans for moving the sliding gear from a neutral position into engagement with either the interior teeth of the reducing gear or into engagement with a part of the double gear and a casing enclosing portions of the drive and driven shafts and the gears.

3. A device of the class described comprising a drive shaft, a diagonally arranged driven shaft, reducing gears connecting the shafts together, the gearon the drive shaft being loosely arranged thereon and having exterior and interior teeththereon, a sliding gear on the drive shaft adapted tomesh with the interior teeth of-the reducing gear, a reversing gear on the driven shaft, a stub shaft, a

a double gear thereon having a part meshing with the reversing gear and another part adapted to mesh with the sliding gear and manually operated means for moving the 

